GrowoniX 400 Gallon/Day Reverse Osmosis FilterDesigned to flow 17 gallons per hour of pure RO water, with an astounding 2: 1 ratioHigh flow rates and water savings never before seen in a package so affordable and durable. Utilizing the most efficient membrane technology in the world, built with dual o ring fittings, and equipped with a steel pressure gauge. A manual flush valve allows you to clean the membrane, purging out pollutants that could otherwise add buildup to the system. Flushing adds